Automatic battery cut-out for telephone-circuits.



A. R. NELSON. AUTOMATIC BATTERY OUT-OUT EOE TELEPHONE CIRCUITS.

APPLICATION FILED MAY 8, 1913.

1,072,400. Patented Sept. 2, 1913.

WITNESSES [NI/EN TOR 2% Wm Jim fl67/s on, I I

ENE-T5231? gTATES EAT R? @FFICE avmmziwm BATEEE? CUT-{i117 F03TELEPHOKECIRQI UITS.

Agpliestian 211%5. May 8, @333. Serial 13:30; 733,333.

i v-m. m: :scribe c call-s, he rexzifflesflw receiver and Be it kz-i-mvnr NTON R? NELSON, :1 turns tin) crank his generator, Wi'llCh encitizsnnf the Hm iii Janesviliei in is :01 of Califoinim have n'ivnted' certainnaw renmves the i'ece'iver withou-iteaching the useful Imiamvements inAutomatie Baigeneraior. Th member A then rests upmi' fiery -Uflt ferTeiegimm irc its, of the disk and cicses lisieninf circnii't which thefollowing is a e v-ifiiration, x'efe'r- Eiarough IEQQQIVGI R as Wlilappear ineregxfier. mice b i h d QC. Th (FHCUIES are as foilb-ws: Tileringer drawing, circuit 18 t 1, 3, 3,- 4', The ringing 01' generatorcircuit While ilhe cra'nk is being iHZ'HQii is: t. 1, Si, 6 kin-I 8, 9,G, g, 8 p, 79", 4 The battery transmitter-zir- .r' 2', a, H, a; 14, mm mThis is cimmd only when Hie hank is wag 12 with the recaiver ufi": andthe 1% clear 05 tibi- (iisi'r g The ii-siening 1 i. operated is:

, R? G a 21'; i so be traced from 5, 6 H,

Skates, residing at abifis him aftfirward bath to taik and t0 ne(nut-act (i'tuurhes 9: 7. 1 how but does not, -xtop lever 1'5 15 and thefiber i is fniiows: Narmaliy V circuit through Q closed. call f" v a):party, the Yes; the receiver R from i116 hook iiierenpmz hits uni 5 stoplever 71- 5 in the dial; 9', Whemnpun the crank 39. m' circuit istraidg'si iiijl, u H19 gana'a Mv in aim 1i. Q-UEDi-Ed in ring, and. at(nova-malt the ii AJWS the mdwisv, (-ieuvrs (118 g frmn .10 kwer 1}, 3that Th1: wilcii hook i-H 19:; mini mmpiele ii-1e (insure 7; and finallythe shaft 8 am doses 5, s complain the ringing circuit. 7 in the crankis; E": i9LSG(i, the shaft is drawn back by til? :11 in but the. stoplever 71 ifi'lfifilIlS-CIOSHL (,rmfcez'smivn can then pro (fee-i asusual. in Fscs v 19;, and

subariber hearizszvw and turns i i Y i m? a brief an psthe stay; 1% "e1-h and :103 s his talking 7 201117 talking,

1 the s 7cm nection fram t: crank of Hm w my invention What desire insecur a by Letters Fab 1 :ty of Lassen and State b 3323; but when heWishes to listen only, he 66 "-11 scund fakes d'own his re:

,akeg dawn. {he re- 10.?

trans: iitter,'a receiver. a switch hook and a. g V In a telephonesubstation apparatus, a

calling device, with circuit connections for g each. contacts in thetransmitter and in the 1 receiver circuits controlled by the switchhook, means normally permitting the switch hook to close the receivercircuit but blocking closure of the transmitter circuit, and meansbecoming active in the operation of the calling device to remove saidblock and permit the closure of the transmitter cirt-uit, substantiallyas described.

2. in a telephone'substation apparatus, a ransmitter in a local circuit,a receiver, 'ngring generator, and switch hook, con- ..ts adapted to besuccessively closed by the switch hook in its movement and included inthe receiver circuit and in the transmitter circuit respectively, a.stop element carried by the switch hook, and a cooperating element undercontrol of the ringing generator in its operation, adapted to normallypermit closure by the switch hook of contacts in the receiver circuitonly, but when the generator has been operated, adapted to be removedfrom the path of the blocking elementof the switch hook to completeactuation thereof in the closure of the transmitter circuit,substantially as described.

switch hook H, generator Gr, transmitter T, battery B, and receiver B,said switch hook provided with contacts 6 and 7 closed successively inits movement, the contact- 6 adapted when closed to complete the circuitof the receiver B through the switch hook, and the contact 7 when closedadapted to complete the circuit of the transmitter T through the batteryB and the switch hook, said hook being further provided with a stoplever h and the generator G provided with. a cooperating stop 9 normallylying in the path of said stop lever and so related thereto as to permitthe closure of contact 6 only, but adapted when the generator isoperated to be moved out of the path of said lever h and thereby topermit the further movement of the switch hook and the closure of thetransmitter contact 7, all as and for the purpose intended,substantially as described. i

In testimony whereof I aflix my signature in presence of two witnesses.

ANTON It. NELSON.

Witnesses:

F. B. HOFFMAN, EDGAR FRAZIER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, .51.

